Malicious PDF — malware analysis report

Static analysis result for SHA-256 daca066a83f86a14…

MALICIOUS

PDF

89.3 KB Created: 2021-06-28 01:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ecd7eee4ce34579bda7aa10534af9f36 SHA-1: d27c64131e5c3e1de436a8eb1cb410aae37dfb9c SHA-256: daca066a83f86a14799d1b247140cddcb6464c6b57b78b14291005989908f124
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm pointing to compromised WordPress upload storage, suggesting it's designed to trick users into downloading further malicious content. While no scripts were explicitly extracted, the PDF structure and link farm are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://mabifitness.it/userfiles/files/83633634501.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd530fe2bf9---64008761991.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddb226e59b---gawisipuronofonagoxe.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d757c95c85f---67678040555.pdf
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/f80612445eaf292883b5ca6eef47a9e7/56033425694.pdf
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/1cfb94e71961f58d55530490fc66d031/80814963538.pdf
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/57123948571.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160865fbff3b9d---kolufa.pdf
    • http://dansensvenner.dk/imagesfile///pifinitaberitarajiritede.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/92df2c5424300fc0c8cdca95c42a17e2/76935264621.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7f481af09---4543288996.pdf
    • http://bitite.lv/media/txt/122/file/jawulij.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/31deeb4aa4e811615281fcac1be9dc77/52086281657.pdf
    • http://mientaytourist.com/uploads/files/7033621609.pdf
    • https://dm288.rs/slicice/file/fedujelafitabogu.pdf
    • https://angkorphotographyguide.com/userfiles/file/72473618376.pdf
    • http://czdashan.cn/uploadfile/file/2021050703104773499.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085286334eba---zajalara.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608663fe27b06---vakowasinezotasebebaku.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/2acm6bil2ldnq701d1ldd534dq/nobupovevajavezaru.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160732e5a65822---tofiloj.pdf
    • http://busangh.com/attfile/fckimg/file///2021061610508_170319262.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160709b3feca01---ganujofusuluxopuvavatim.pdf
    • http://zartmobilia.com/userfiles/file/20210523074315.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/50cbbc648ec1975e7841c8ad70cc9184/garel.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/mpamtsavcjniprlg78kmmt5594/59521098727.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=the+hobbit+an+unexpected+journey+full+movie+free+download+480p
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f44b.bin
af08d1ab03e30b10f031ec742be945c4f71017a2ce726a7bedb3b5cdee6f2b98
pdf-font-stream PDF embedded font (sfnt) at offset 0xF44B 17884 bytes
font_01_sfnt_off000122fb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x122FB 16792 bytes
font_02_sfnt_off00013b12.bin
b9865d9ee835884cea00a9bb1899bd78a41d6bdb583c2aeb432d85b2c94f1b0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B12 11824 bytes